WaterRower S1 Rowing Machine with S4 Performance Monitor
Waterrower External Digital Heart Rate Monitoring Kit ANT+
How to combine heart rate monitor with distance in one app? : r/waterrower
GymRats UK WaterRower A1 Studio Rowing Machine with A1 Performance Workout Monitor (upgradeable to WaterRower SmartRow) Premium Gym Equipment Supplier since 1999
WATERROWER SmartRow - Ultra high tech rowing performance data transmitter and app